3.0

2.0

2.0

2.0

3.0

1.1

1.1

1.35

1.35

0.6

0.6

0.8

0.8

0.6

0.8

0.6

0.6

?

?

3.0

3.0

2.0

2.0

0.8

0.8

0.6

0.6

0.8

0.6

1.35

1.1

1.1

1.35

4.0

4.0

4.0

4.0

3.0

2.0

1.1

1.1

1.1

1.35

1.35

0.6

0.6

0.6

0.8

0.8

0.8

R 105 W

R 110 W

T

40

N

R 5 W

R 100 W

R 1 W R 1 E

T

5

N

R 5 W

R 95 W

R 5 E

T

1

N

T

1

S

R 1 W

T

5

N

T

1

N

R 1 E

T

30

N

R 100 W

R 5 E

T

1

S

T

40

N

T

35

N

R 95 W

T

30

N

R 90 W R 85 W

R 80 W

T

30

N

R 105 W

R 110 W

T

40

N

R 5 W

R 100 W

R 1 W R 1 E

T

5

N

R 5 W

R 95 W

R 5 E

T

1

N

T

1

S

R 1 W

T

5

N

T

1

N

R 1 E

T

30

N

R 100 W

R 5 E

T

1

S

T

40

N

T

35

N

R 95 W

T

30

N

R 90 W R 85 W

R 80 W

T

30

N

R 105 W

R 110 W

T

40

N

R 5 W

R 100 W

R 1 W R 1 E

T

5

N

R 5 W

R 95 W

R 5 E

T

1

N

T

1

S

R 1 W

T

5

N

T

1

N

R 1 E

T

30

N

R 100 W

R 5 E

T

1

S

T

40

N

T

35

N

R 95 W

T

30

N

R 90 W R 85 W

R 80 W

T

30

N

Washakie Range

Wind

River

Range

Mountains Creek

Owl

Bighorn

Mountains

Casper

arch

Granite

Mountains

MADDEN ANTICLINE

Washakie Range

Wind

River

Range

Mountains Creek

Owl

Bighorn

Mountains

Casper

arch

Granite

Mountains

MADDEN ANTICLINE

Washakie Range

Wind

River

Range

Mountains Creek

Owl

Bighorn

Mountains

Casper

arch

Granite

Mountains

MADDEN ANTICLINE

Western limit

Western limit

of the Conant 

of the Wallace 

Creek tongue

Creek Tongue

Cody Shale

of

Cody Shale

of

43°

110° 109° 108° 107°

110° 109° 108° 107°

43°

43°

110° 109° 108° 107°

110° 109° 108° 107°

43°

43°

110° 109° 108° 107°

110° 109° 108° 107°

43°

Wind River Basin Province boundary

Cody Shale outcrop

Precambrian rocks

High-angle fault

Thrust fault—Sawteeth on upper plate

Anticline

Well sample point

Composite well sample point

Outcrop sample point

Line of section (see fig. 7)

Vitrinite Reflectance (Ro)

EXPLANATION

< 0.6

0.6–0.8

0.8–1.1

1.1–1.35

1.35–2.0

> 2.0

Wind River Basin Province boundary

Cody Shale outcrop

Precambrian rocks

High-angle fault

Thrust fault—Sawteeth on upper plate

Anticline

Well sample point

Composite well sample point

Outcrop sample point

Line of section (see fig. 7)

Vitrinite Reflectance (Ro)

EXPLANATION

< 0.6

0.6–0.8

0.8–1.1

1.1–1.35

1.35–2.0

> 2.0

Wind River Basin Province boundary

Mowry and Thermopolis Shale,

undivided

Precambrian rocks

High-angle fault

Thrust fault—Sawteeth on upper plate

Anticline

Well sample point

Composite well sample point

Outcrop sample point

Line of section (see fig. 7)

Vitrinite Reflectance (Ro)

EXPLANATION

< 0.6

0.6–0.8

0.8–1.1

1.1–1.35

1.35–2.0

> 2.0

10 0 10 20 30 40 50 KILOMETERS

SCALE 1: 500 000

10 0 10 20 30 40 MILES

Map 1. Map showing variations in vitrinite reflectance (Ro) at the top of the Cody Shale, Wind River Basin, Wyoming

Map 2. Map showing variations in vitrinite reflectance (Ro) at the top of the lower shaly member of the Cody Shale, Wind River Basin, Wyoming

Map 3. Map showing variations in vitrinite reflectance (Ro) at the top of the Mowry Shale, Wind River Basin, Wyoming

Maps Showing Thermal Maturity of Upper Cretaceous Marine Shales in the Wind River Basin, Wyoming

By

Thomas M. Finn and Mark J. Pawlewicz

2013

Any use of trade, firm, or product names is for descriptive purposes only 

and does not imply endorsement by the U.S. Government.

Although this information product, for the most part, is in the public 

domain, it also contains copyrighted materials as noted in the text. 

Permission to reproduce copyrighted items must be secured from the 

copyright owner.

Although these data have been processed successfully on a computer 

system at the U.S. Geological Survey (USGS), no warranty expressed or 

implied is made regarding the display or utility of the data on any other 

system, or for general or scientific purposes, nor shall the act of 

distribution constitute any such warranty. The USGS shall not be held 

liable for improper or incorrect use of the data described and/or 

contained herein.

Center Director, USGS Central Energy Resources Science Center

Box 25046, Mail Stop 939

Denver, CO 80225

(303) 236-1647

Or visit the Central Energy Resources Science Center Web site at:

http://energy.usgs.gov/

Publishing support provided by: 

Denver Publishing Service Center

Manuscript approved for publication July 13, 2013

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This report is available at:

http://pubs.usgs.gov/sim/3266

Suggested citation:

Finn, T.M., and Pawlewicz, M.J., 2013, Maps showing thermal 

maturity of Upper Cretaceous marine shales in the Wind River 

Basin, Wyoming: U.S. Geological Survey Scientific 

Investigations Map 3266, 13 p., scale 1:500,000, 

http://dx.doi.org/10.3133/sim3266/.

U.S. Department of the Interior

U.S. Geological Survey

Scientific Investigations Map 3266

Pamphlet accompanies map

WYOMING

Wind River Basin

MAP LOCATION

ISSN 2329-132X (online)

http://dx.doi.org/10.3133/sim3266